Plasmonics involves the study of the interaction between electromagnetic field and free electrons in a metal. Nanostructures can support localized surface plasmon resonances (LSPRs), which enhance the local electromagnetic field. This enhancement can lead to increased sensitivity in biosensors and improved efficiency in photovoltaic cells. Plasmonic nanoparticles are also used in photothermal therapy, where they convert light into heat to target cancer cells.
